diff options
Diffstat (limited to 'examples/audioinput/audioinput.cpp')
| -rw-r--r-- | examples/audioinput/audioinput.cpp | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/examples/audioinput/audioinput.cpp b/examples/audioinput/audioinput.cpp deleted file mode 100644 index bedbd63..0000000 --- a/examples/audioinput/audioinput.cpp +++ /dev/null @@ -1,366 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** You may use this file under the terms of the BSD license as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor -** the names of its contributors may be used to endorse or promote -** products derived from this software without specific prior written -** permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <stdlib.h> -#include <math.h> - -#include <QDebug> -#include <QPainter> -#include <QVBoxLayout> - -#include <qaudiodeviceinfo.h> -#include <qaudioinput.h> - -#include <QtCore/qendian.h> - -#include "audioinput.h" - -const QString InputTest::PushModeLabel(tr("Enable push mode")); -const QString InputTest::PullModeLabel(tr("Enable pull mode")); -const QString InputTest::SuspendLabel(tr("Suspend recording")); -const QString InputTest::ResumeLabel(tr("Resume recording")); - -const int BufferSize = 4096; - -AudioInfo::AudioInfo(const QAudioFormat &format, QObject *parent) - : QIODevice(parent) - , m_format(format) - , m_maxAmplitude(0) - , m_level(0.0) - -{ - switch (m_format.sampleSize()) { - case 8: - switch (m_format.sampleType()) { - case QAudioFormat::UnSignedInt: - m_maxAmplitude = 255; - break; - case QAudioFormat::SignedInt: - m_maxAmplitude = 127; - break; - default: - break; - } - break; - case 16: - switch (m_format.sampleType()) { - case QAudioFormat::UnSignedInt: - m_maxAmplitude = 65535; - break; - case QAudioFormat::SignedInt: - m_maxAmplitude = 32767; - break; - default: - break; - } - break; - default: - break; - } -} - -AudioInfo::~AudioInfo() -{ -} - -void AudioInfo::start() -{ - open(QIODevice::WriteOnly); -} - -void AudioInfo::stop() -{ - close(); -} - -qint64 AudioInfo::readData(char *data, qint64 maxlen) -{ - Q_UNUSED(data) - Q_UNUSED(maxlen) - - return 0; -} - -qint64 AudioInfo::writeData(const char *data, qint64 len) -{ - if (m_maxAmplitude) { - Q_ASSERT(m_format.sampleSize() % 8 == 0); - const int channelBytes = m_format.sampleSize() / 8; - const int sampleBytes = m_format.channels() * channelBytes; - Q_ASSERT(len % sampleBytes == 0); - const int numSamples = len / sampleBytes; - - quint16 maxValue = 0; - const unsigned char *ptr = reinterpret_cast<const unsigned char *>(data); - - for (int i = 0; i < numSamples; ++i) { - for(int j = 0; j < m_format.channels(); ++j) { - quint16 value = 0; - - if (m_format.sampleSize() == 8 && m_format.sampleType() == QAudioFormat::UnSignedInt) { - value = *reinterpret_cast<const quint8*>(ptr); - } else if (m_format.sampleSize() == 8 && m_format.sampleType() == QAudioFormat::SignedInt) { - value = qAbs(*reinterpret_cast<const qint8*>(ptr)); - } else if (m_format.sampleSize() == 16 && m_format.sampleType() == QAudioFormat::UnSignedInt) { - if (m_format.byteOrder() == QAudioFormat::LittleEndian) - value = qFromLittleEndian<quint16>(ptr); - else - value = qFromBigEndian<quint16>(ptr); - } else if (m_format.sampleSize() == 16 && m_format.sampleType() == QAudioFormat::SignedInt) { - if (m_format.byteOrder() == QAudioFormat::LittleEndian) - value = qAbs(qFromLittleEndian<qint16>(ptr)); - else - value = qAbs(qFromBigEndian<qint16>(ptr)); - } - - maxValue = qMax(value, maxValue); - ptr += channelBytes; - } - } - - maxValue = qMin(maxValue, m_maxAmplitude); - m_level = qreal(maxValue) / m_maxAmplitude; - } - - emit update(); - return len; -} - -RenderArea::RenderArea(QWidget *parent) - : QWidget(parent) -{ - setBackgroundRole(QPalette::Base); - setAutoFillBackground(true); - - m_level = 0; - setMinimumHeight(30); - setMinimumWidth(200); -} - -void RenderArea::paintEvent(QPaintEvent * /* event */) -{ - QPainter painter(this); - - painter.setPen(Qt::black); - painter.drawRect(QRect(painter.viewport().left()+10, - painter.viewport().top()+10, - painter.viewport().right()-20, - painter.viewport().bottom()-20)); - if (m_level == 0.0) - return; - - int pos = ((painter.viewport().right()-20)-(painter.viewport().left()+11))*m_level; - painter.fillRect(painter.viewport().left()+11, - painter.viewport().top()+10, - pos, - painter.viewport().height()-21, - Qt::red); -} - -void RenderArea::setLevel(qreal value) -{ - m_level = value; - update(); -} - - -InputTest::InputTest() - : m_canvas(0) - , m_modeButton(0) - , m_suspendResumeButton(0) - , m_deviceBox(0) - , m_device(QAudioDeviceInfo::defaultInputDevice()) - , m_audioInfo(0) - , m_audioInput(0) - , m_input(0) - , m_pullMode(false) - , m_buffer(BufferSize, 0) -{ - initializeWindow(); - initializeAudio(); -} - -InputTest::~InputTest() {} - -void InputTest::initializeWindow() -{ - QScopedPointer<QWidget> window(new QWidget); - QScopedPointer<QVBoxLayout> layout(new QVBoxLayout); - - m_canvas = new RenderArea(this); - layout->addWidget(m_canvas); - - m_deviceBox = new QComboBox(this); - QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput); - for(int i = 0; i < devices.size(); ++i) - m_deviceBox->addItem(devices.at(i).deviceName(), qVariantFromValue(devices.at(i))); - - connect(m_deviceBox, SIGNAL(activated(int)), SLOT(deviceChanged(int))); - layout->addWidget(m_deviceBox); - - m_modeButton = new QPushButton(this); - m_modeButton->setText(PushModeLabel); - connect(m_modeButton, SIGNAL(clicked()), SLOT(toggleMode())); - layout->addWidget(m_modeButton); - - m_suspendResumeButton = new QPushButton(this); - m_suspendResumeButton->setText(SuspendLabel); - connect(m_suspendResumeButton, SIGNAL(clicked()), SLOT(toggleSuspend())); - layout->addWidget(m_suspendResumeButton); - - window->setLayout(layout.data()); - layout.take(); // ownership transferred - - setCentralWidget(window.data()); - QWidget *const windowPtr = window.take(); // ownership transferred - windowPtr->show(); -} - -void InputTest::initializeAudio() -{ - m_pullMode = true; - - m_format.setFrequency(8000); - m_format.setChannels(1); - m_format.setSampleSize(16); - m_format.setSampleType(QAudioFormat::SignedInt); - m_format.setByteOrder(QAudioFormat::LittleEndian); - m_format.setCodec("audio/pcm"); - - QAudioDeviceInfo info(QAudioDeviceInfo::defaultInputDevice()); - if (!info.isFormatSupported(m_format)) { - qWarning() << "Default format not supported - trying to use nearest"; - m_format = info.nearestFormat(m_format); - } - - m_audioInfo = new AudioInfo(m_format, this); - connect(m_audioInfo, SIGNAL(update()), SLOT(refreshDisplay())); - - createAudioInput(); -} - -void InputTest::createAudioInput() -{ - m_audioInput = new QAudioInput(m_device, m_format, this); - connect(m_audioInput, SIGNAL(notify()), SLOT(notified())); - connect(m_audioInput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State))); - m_audioInfo->start(); - m_audioInput->start(m_audioInfo); -} - -void InputTest::notified() -{ - qWarning() << "bytesReady = " << m_audioInput->bytesReady() - << ", " << "elapsedUSecs = " <<m_audioInput->elapsedUSecs() - << ", " << "processedUSecs = "<<m_audioInput->processedUSecs(); -} - -void InputTest::readMore() -{ - if(!m_audioInput) - return; - qint64 len = m_audioInput->bytesReady(); - if(len > BufferSize) - len = BufferSize; - qint64 l = m_input->read(m_buffer.data(), len); - if(l > 0) { - m_audioInfo->write(m_buffer.constData(), l); - } -} - -void InputTest::toggleMode() -{ - // Change bewteen pull and push modes - m_audioInput->stop(); - - if (m_pullMode) { - m_modeButton->setText(PullModeLabel); - m_input = m_audioInput->start(); - connect(m_input, SIGNAL(readyRead()), SLOT(readMore())); - m_pullMode = false; - } else { - m_modeButton->setText(PushModeLabel); - m_pullMode = true; - m_audioInput->start(m_audioInfo); - } - - m_suspendResumeButton->setText(SuspendLabel); -} - -void InputTest::toggleSuspend() -{ - // toggle suspend/resume - if(m_audioInput->state() == QAudio::SuspendedState) { - qWarning() << "status: Suspended, resume()"; - m_audioInput->resume(); - m_suspendResumeButton->setText(SuspendLabel); - } else if (m_audioInput->state() == QAudio::ActiveState) { - qWarning() << "status: Active, suspend()"; - m_audioInput->suspend(); - m_suspendResumeButton->setText(ResumeLabel); - } else if (m_audioInput->state() == QAudio::StoppedState) { - qWarning() << "status: Stopped, resume()"; - m_audioInput->resume(); - m_suspendResumeButton->setText(SuspendLabel); - } else if (m_audioInput->state() == QAudio::IdleState) { - qWarning() << "status: IdleState"; - } -} - -void InputTest::stateChanged(QAudio::State state) -{ - qWarning() << "state = " << state; -} - -void InputTest::refreshDisplay() -{ - m_canvas->setLevel(m_audioInfo->level()); -} - -void InputTest::deviceChanged(int index) -{ - m_audioInfo->stop(); - m_audioInput->stop(); - m_audioInput->disconnect(this); - delete m_audioInput; - - m_device = m_deviceBox->itemData(index).value<QAudioDeviceInfo>(); - createAudioInput(); -} |